Abstract

We study the large time asymptotics of solutions to the Cauchy problem for the nonlinear nonlocal Schrödinger equation with critical nonlinearity i∂tu-∂x2u+∂x2u-a∂x4u=λu2u,t>0,x∈R,u0,x=u0x,x∈R,\\documentclass[12pt]{minimal}\t\t\t\t\\usepackage{amsmath}\t\t\t\t\\usepackage{wasysym}\t\t\t\t\\usepackage{amsfonts}\t\t\t\t\\usepackage{amssymb}\t\t\t\t\\usepackage{amsbsy}\t\t\t\t\\usepackage{mathrsfs}\t\t\t\t\\usepackage{upgreek}\t\t\t\t\\setlength{\\oddsidemargin}{-69pt}\t\t\t\t\\begin{document}$$\\begin{aligned} \\left\\{ \\begin{array}{l} i\\partial _{t}\\left( u-\\partial _{x}^{2}u\\right) +\\partial _{x}^{2}u-a\\partial _{x}^{4}u=\\lambda \\left| u\\right| ^{2}u,\\text { } t>0,{\\ }x\\in {\\mathbb {R}}\\mathbf {,} \\\\ u\\left( 0,x\\right) =u_{0}\\left( x\\right) ,{\\ }x\\in {\\mathbb {R}}\\mathbf {,} \\end{array} \\right. \\end{aligned}$$\\end{document}where a>frac{1}{5},lambda in {mathbb {R}}. We continue to develop the factorization techniques which was started in papers Hayashi and Naumkin (Z Angew Math Phys 59(6):1002–1028, 2008) for Klein–Gordon, Hayashi and Naumkin (J Math Phys 56(9):093502, 2015) for a fourth-order Schrödinger, Hayashi and Kaikina (Math Methods Appl Sci 40(5):1573–1597, 2017) for a third-order Schrödinger to show the modified scattering of solutions to the equation. The crucial points of our approach presented here are based on the {mathbf {L}}^{2}-boundedness of the pseudodifferential operators.

Highlights

  • We study the large time asymptotics of solutions to the Cauchy problem for the nonlinear nonlocal Schrodinger equation with critical nonlinearity i∂t u − ∂x2u + ∂x2u − a∂x4u = λ |u|2 u, t > 0, x ∈ R, u (0, x) = u0 (x), x ∈ R, where a

  • Multiplying Eq (1.1) by the operator 1 − ∂x2 −1, we rewrite it in the pseudodifferential form i∂tu − Λu = λ 1 − ∂x2 −1 |u|2 u, t > 0, x ∈ R, u (0, x) = u0 (x), x ∈ R, (1.2)

  • As far as we know, there are no results on the large time asymptotics of solutions of the Cauchy problem

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Summary

Introduction

Schrodinger equation introduced by [30] to describe the nonlinear propagation of pulses through optical fibers. It arises in the context of high-speed soliton transmission in long-haul optical communication system [12]. Where the linear pseudodifferential operator Λ = 1 − ∂x2 −1 −∂x2 + a∂x4 is characterized by its symbol. As far as we know, there are no results on the large time asymptotics of solutions of the Cauchy problem (1.1). The difficulty of the small data scattering problem lies in the slow time decay rate of the L∞-norm of solutions to the linear problem. The problem on the large time asymptotic behavior becomes more

Page 2 of 15
Factorization techniques
Page 6 of 15
Estimate for the defect operator in the uniform norm
Estimate for the adjoint defect operator in the uniform norm
Boundedness of pseudodifferential operators
Estimate for derivative of the adjoint defect operator
Asymptotics of the nonlinearity
A priori estimate of solutions
Methods
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